Impact measurement is a research area focused on assessing and quantifying the effects of a particular program, policy, or intervention on various outcomes. This can include measuring changes in social, economic, environmental, or health-related indicators as a result of the intervention. Impact measurement aims to provide evidence of the effectiveness and efficiency of interventions, and to inform decision-making and resource allocation. It involves the use of various evaluation methods and tools to collect, analyze, and interpret data to determine the impact of a specific intervention. Ultimately, impact measurement helps organizations and policymakers understand whether their interventions are achieving the desired outcomes and make informed decisions about how to improve their impact in the future.